T

Second closest moon of Neptune, orbiting the planet at an average distance of 50,075 kilometres (31,115 miles). Its diameter is about 83 km (52 miles). Thalassa was discovered in 1989 by Voyager 2.

Thebe

moon of jupiter

Thelxinoe

moon of jupiter

Themisto

moon of jupiter

Thrust

Thruster

Thrymr

moon of saturn

Thyone

moon of jupiter

Titan

moon of saturn

Titania

Trinculo

Triton

Neptune's largest moon. It was discovered in 1846 by British astronomer and beer brewer, William Lassell, and thought to be Neptune's only moon until Nereid was discovered in 1949. Triton is Neptune's only spherical moon with a diameter of 2,707 kilometres. It orbits at a distance of 354,800 kilometres (220,462 miles) taking 5 days and 21 hours to complete an orbit.